#!/usr/bin/env python

import os

def funcion(sys):
	""" ver si devuelve algo.. """
	i=0

	while i<10:
		print i
		if i==5:
			a='modificado'
			break
		i+=1

	return a

if __name__ == "__main__":

	a = [1,3,4,5,7,9,12]
	b = [3,4,6,42,9]

	c = [x for x in a if b.count(x)]

	print a, b
	print c

	raw_input()
